void
TileModel::generateElevationTexture()
{
osg::Image* image = 0L;
osg::HeightField* hf = _elevationData.getHeightField();
if ( hf )
{
ImageToHeightFieldConverter conv;
image = conv.convert( hf, 32 );
}
else
{
// no heightfield; create one and initialize it to zero.
image = new osg::Image();
image->allocateImage(32, 32, 1, GL_LUMINANCE, GL_FLOAT);
ImageUtils::PixelWriter write(image);
for(int s=0; s<image->s(); ++s)
for(int t=0; t<image->t(); ++t)
write(osg::Vec4(0,0,0,0), s, t);
}
_elevationTexture = new osg::Texture2D( image );
_elevationTexture->setInternalFormat(GL_LUMINANCE32F_ARB);
_elevationTexture->setSourceFormat(GL_LUMINANCE);
_elevationTexture->setFilter( osg::Texture::MAG_FILTER, osg::Texture::LINEAR );
_elevationTexture->setFilter( osg::Texture::MIN_FILTER, osg::Texture::LINEAR );
_elevationTexture->setWrap ( osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE );
_elevationTexture->setWrap ( osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE );
_elevationTexture->setResizeNonPowerOfTwoHint( false );
_elevationTexture->setMaxAnisotropy( 1.0f );
}
void
Cache::setHeightField( const TileKey& key, const CacheSpec& spec, const osg::HeightField* hf)
{
ImageToHeightFieldConverter conv;
//Take a reference to the returned image so it gets deleted properly
osg::ref_ptr<osg::Image> image = conv.convert(hf);
setImage( key, spec, image.get() );
}
osg::HeightField*
TileSource::createHeightField(const TileKey& key,
ProgressCallback* progress)
{
//osg::ref_ptr<osg::Image> image = createImage(key, dbOptions, progress);
osg::ref_ptr<osg::Image> image = createImage(key, progress);
osg::HeightField* hf = 0;
if (image.valid())
{
ImageToHeightFieldConverter conv;
hf = conv.convert( image.get() );
}
return hf;
}
bool
Cache::getHeightField( const TileKey& key, const CacheSpec& spec, osg::ref_ptr<const osg::HeightField>& out_hf )
{
//Try to get an image from the cache
osg::ref_ptr<const osg::Image> image;
if ( getImage( key, spec, image ) )
{
OE_DEBUG << LC << "Read cached heightfield " << std::endl;
ImageToHeightFieldConverter conv;
out_hf = conv.convert(image.get());
return out_hf.valid();
}
else return false;
}
osg::HeightField*
WCS11Source::createHeightField(const TileKey& key,
ProgressCallback* progress)
{
osg::HeightField* field = NULL;
osg::ref_ptr<osg::Image> image = createImage( key, progress );
if ( image.valid() )
{
ImageToHeightFieldConverter conv;
conv.setRemoveNoDataValues( true );
field = conv.convert( image.get() );
}
return field;
}
bool
TileSource::storeHeightField(const TileKey& key,
osg::HeightField* hf,
ProgressCallback* progress)
{
if ( _status != STATUS_OK || hf == 0L )
return 0L;
ImageToHeightFieldConverter conv;
osg::ref_ptr<osg::Image> image = conv.convert(hf, 32);
if (image.valid())
{
return storeImage(key, image.get(), progress);
}
return false;
}
/** override */
osg::HeightField* createHeightField( const TileKey& key, ProgressCallback* progress)
{
osg::Image* image = createImage(key, progress);
if (!image)
{
OE_INFO << "[osgEarth::WMS] Failed to read heightfield from " << createURI(key) << std::endl;
}
float scaleFactor = 1;
//Scale the heightfield to meters
if ( _options.elevationUnit() == "ft")
{
scaleFactor = 0.3048;
}
ImageToHeightFieldConverter conv;
return conv.convert( image, scaleFactor );
}
